<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="../bootstrap-5.1.3-dist/css/bootstrap.css">
  <script src="../bootstrap-5.1.3-dist/js/bootstrap.js"></script>
</head>

<body>

  <body>
    <div class="container pt-3">
      <h1>响应式容器</h1>
    </div>
    <div class="container-sm border">.container-sm</div>
    <div class="container-md mt-3 border">.container-md</div>
    <div class="container-lg mt-3 border">.container-lg</div>
    <div class="container-xl mt-3 border">.container-xl</div>
    <div class="container-xxl mt-3 border">.container-xxl</div>

  </body>

</html>